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    <meta charset="UTF-8">
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    <title></title>
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        table {
            border-collapse: collapse;
            caption-side: bottom;
        }
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<body>
    <table border="1" width=100%>
        <caption>课程表</caption>
        <tr>
            <td>星期一</td>
            <td>星期二</td>
            <td>星期三</td>
            <td>星期四</td>
            <td>星期五</td>
        </tr>
        <tr>
            <td>语文</td>
            <td>数学</td>
            <td>数学</td>
            <td>历史</td>
            <td>政治</td>
        </tr>
        <tr>
            <td>语文</td>
            <td>数学</td>
            <td>数学</td>
            <td>历史</td>
            <td>政治</td>
        </tr>
        <tr>
            <td>语文</td>
            <td>数学</td>
            <td>数学</td>
            <td>历史</td>
            <td>政治</td>
        </tr>
    </table>
</body>

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